61287076764 has 48 divisors (see below), whose sum is σ = 159170851840. Its totient is φ = 20393227440.

The previous prime is 61287076751. The next prime is 61287076777. The reversal of 61287076764 is 46767078216.

It is an interprime number because it is at equal distance from previous prime (61287076751) and next prime (61287076777).

It is a super-2 number, since 2×61287076764² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 61287076764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435244 + ... + 558579.

Almost surely, 2^61287076764 is an apocalyptic number.

It is an amenable number.

61287076764 is an abundant number, since it is smaller than the sum of its proper divisors (97883775076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61287076764 is a wasteful number, since it uses less digits than its factorization.

61287076764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994407 (or 994399 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 61287076764 in words is "sixty-one billion, two hundred eighty-seven million, seventy-six thousand, seven hundred sixty-four".